Skill: understand the journey of a river Rivers The Amazon river

Today we are going to investigate the journey of a river Today we are going to investigate the journey of a river. We will look at where and how rivers start and the journey they take across the land to a larger body of water. The Danube river

Where do rivers begin? How do rivers begin? Rivers begin at Divides (mountains) and they begin when rainwaters fill in drainage basins. These drainage basins are also called watersheds. Our water shed is the YADKIN PEE-DEE The Ganges river

Who can tell me how rivers begin? Clouds release their rain over the hills. Most of this soaks into the ground to become groundwater. Some groundwater comes to the surface to form springs. Springs join together to make streams. Who can tell me how rivers begin? As the streams trickle down the hillside they join together, getting bigger as they go, until they become rivers.

The journey of a river can be divided into three sections: upper middle lower The Yangtze river

The Upper Course The upper course of a river starts at the source, these form from springs and groundwater in the mountains this is where the river begins. Mountain Rain Groundwater Springs Springs go on to form streams RIVER SOURCE

A river's journey - the middle course On either side of the middle course of the river are floodplains, these areas are flat and often become flooded when heavy rainfall causes the river to overflow. Sometimes another river (a tributary) will join a river; the joining point is called a confluence. A river's journey - the middle course Floodplains Original river Tributary (joining river) Confluence The river widens to allow for the extra water that the joining river brings.

The Middle Course – Meanders A meander is a large bend in the river. If a river floods, the neck of the meander becomes flooded and the river will take this route – rivers take the shortest route. Over time the neck of the meander will become the new path of the river, soil will be deposited by the river and the meander will be cut of completely and end up forming a Lake. River takes shortest route Meander is cut off and ox bow lake forms Meander Flood Soil deposited

The Lower Course The lower course of the river leads to the mouth of the river; the mouth of the river is where the river meets the sea. The lower course of the river has larger meanders. The river has energy and so carries less material, it deposits the soil and other materials which eventually form small islands or deltas.